Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49f6e78b37fb845…

MALICIOUS

PDF

115.1 KB Created: 2021-07-06 11:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 21ed381bdd80ac178ef80b3969942c2c SHA-1: aa7ac8861fc3679f49c2dfa2962ce9282ebb7404 SHA-256: e49f6e78b37fb845ba8f75e57c88955fcb93228007eeb78bd8602c85c6e61faa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate malicious intent, classifying this PDF as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute further malicious content or phish for credentials. No scripts were extracted, but the PDF structure and URL heuristics point towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3207a1a251---8259967623.pdf In PDF document text
    • http://csc025.com/userfiles/file/20210706122405_xvt222.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/webekegokazumadi.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/zomoruno.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47b5ebd90bf7e99631dc6727ccaf56e0/62469553915.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0jen5juhd0f07j1pmo6f7slb7/wixoromus.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db7c0b55322---11909676732.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0755266348---56474302841.pdfIn PDF document text
    • http://hchs1972.com/clients/2/2c/2cb73362227bcfbd3ed6ae01b5b3dc46/File/23114687230.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/vopemalazadibanerizu.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160c99f120ca9e---34384798326.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609df8594a804---rorafupedupitigore.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///42135630793.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/58670594906.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdebe047394---493619548.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/27754576958.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/27965293320.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/58489194359.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/b7bf20b90eb83145a1041aa58803ad96/waforiwujuvum.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/87922036516.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062117465767.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/so86orck3n55nstsrfoa54ukd8/pimebivolidetevokofopisaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=always+have+an+attitude+of+gratitudePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAB 17928 bytes
SHA-256: d4e5723215d3d8b58dd4815007610f8d4b2e185e096ccfd96539c87bb73642d9
font_01_sfnt_off00018c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C52 10980 bytes
SHA-256: 7406125b841dc29b0267816fffdf4916c2e1fe1dd7312b621d3a01a10b87512b
font_02_sfnt_off0001a5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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